The Divvy bikeshare system, located in the City of Chicago and two adjacent suburbs, officialy launched in June 2013 and - with over 13,8 million logged rides and nearly 6 million trip hours through December 2017 - it is one of the largest and most successful bikeshare systems in the country.

This research carried out by DePaul University's Chaddick Institute briefly traces the evolution of Chicago's Divvy system beginning with its initial rollout in 2013 through its first and second expansions, in 2015 and 2016, respectively, paying special attention to service and performance gaps. We also develop a series of statistical models to identify factors that best explain variations in Divvy system usage at the station level.